Jacko Postpones ShowsBlame Game Begins

5/20/2009 5:40 PM PDT

Jacko Postpones Shows -- Blame Game Begins

You can't say you didn't see this coming -- Michael Jackson has already postponed his first four London concerts ... and the finger pointing has already begun.

Jacko's first show has been pushed back 5 days to July 13 and the other 3 were postponed until March of 2010. On the record, concert promoters are saying it's because they need more time to set up the complex stage -- but that's not what we heard.

Sources close to the situation tell us Jacko is pushing back the dates because he's physically unable to get through an entire show.

Guess we'll have to wait until July to find out ... unless he blows off those dates too.